Ammoniated acid phosphate and process of making same.



nan era-ans Parana ora ion.

THOMAS LCEOPOLD WILLSON AND MAXIMILIAN MATTHEUS HAIF, OF OTTAWA, ONTARIO,

CANADA, ASSIGNORS, BY DIRECT AND MESNE ASSIGNMENTS, TO SOUTHERN IN- VESTMENT C0. OF CANADA, LTD., 0F MONTREAL, CANADA, A CCRPORATION OF CANADA.

AMMONIATED ACID PHOSPI-IATE AND PROCESS OF MAKING SAME.

No Drawing.

To all whom it may concern:

Be it known that we,THoMAs LEOPOLD WVILLsQN and MAXIMILIAN MATTHEUS HAFF, of the city of Ottawa, Province of'Ontario,

Dominion of Canada, have invented certain new and useful Improvements in Ammoniated Acid Phosphate and Methods of Making Same, of which the following is the specification.

This invention relates to an improved method of ammoniating acid phosphate, and the object of the invention is to prevent reversion of the compound to the insoluble form after the ammonia has-been added, and it consists essentially in artificially drying the acid phosphate before the ammonia is added. 4

When ammonia is added to ordinary acid phosphate containing from 16 to 18 1 per cent. P 0 the difliculty is met with that the ammoniated acid phosphate reverts largely to the insoluble form, which is unsuitable for fertilizing purposes. The insoluble phosphate may run as high as 50 per cent.

According to the present invention, the acid superphosphate generally containing from 10 to 13 per cent. moisture when first manufactured,is mechanically dried in any suitable drier, preferably by steam heat or; reduced pressure, or both.

Specification of Letters Patent.

Patented Feb. 9, 1915.

Application filed June 23. 1913. Serial No. 775,435.

The drying operation is carried on until the moisture is reduced to from 6 to 7 per cent; ammonia conveniently in the formof 'gas is then mixed with the dried acid phosfirst drying acid phosphate and then adding ammonia gas thereto.

2. The herein described method of ammoniating acid phosphate which comprises first reducing the amount of moisture in the phosphate to from six to seven per cent,

and then adding ammonia gas thereto.

3. As a new article of manufacture, a dried ammoniated acid phosphate, substantially free from insoluble phosphate.

In witness whereof we have hereunto set our hands in the. presence of two witnesses.

THOMAS LEOPOLD WILLSON. MAXIMILIAN MATTHEUS HAFF. Witnesses:

RUSSEL S. SMART, M. MAHONEY. 

